Combination lock



A. PASS.

COMBINATION LOCK. APPLICATION FILED DEC.28, 1921.

1,41 0,033. Patented Mar. 21, 1922.

"UNITED STATES- ATENT OFFICE.

. ARTHUR .rliss or FLEET, ENGLAND.-

COMBINATION 1400K.

T 0 all whom ill-may concern;

Be it known that I, ARTHUR Pass, a sub- "ect of His Majesty the l King of Great ritain, residing at Brookside, Albany Road,fFleet; I Ia-nts, England, have invented certain new and useful Improvements in Combination Locks, of which the following is a specification, reference .being had therein to the accompanying drawing.

This invention relates to combination locks of the kind wherein a series of pairs of rings are provided with a spring catch or a spring pressed cone for frictionally or yieldingly locking them together thus enabling the combination to be changed without taking the lock to pieces, and has for its object the improved construction and arrangement of such a look as is hereinafter described, pointed out in the claims and illustrated by the accompanying drawings in which Fig. 1 represents a longitudinal section of the lock taken on the line l-1 of Fig. 3 showing the bolt in elevation.

Fig. 2 is an elevation of the lock.

Fig. 3 is a section on the line 33 of Fig. 2.

Fig. is a side elevation of one of the mner rings.

Fig. 5 is a side elevation of one of the outer rings.

Fig. 6 is an elevation of the bolt shown separately and Fig. '7 is a section on the line 77 of Fig. 6.

Fig. 8 is a transverse section of the lock showing a modification.

a is the sliding bolt having ribs or projections a which are cut away to leave gaps (E: the bolt is provided at one end with a hande a and a squared portion a which prevents the bolt rotating. At its other end the bolt is adapted to project from its casing b and to enter a recess in the article to be locked. One end of the casing, as 72*, is removable as by being threaded into the body of easing Z). Each inner ring 0 has the usual locking pin 0 which by engaging with the ribs or projections a locks the bolt in known manner. As shown in Figs. 1, 3 and 4 the inner ring 0 has a recess 0 at one part to receive a spring (Z and a ball d.

The outer ring 6 as shown in Figs. 3 and 5 is formed with a number of cavities e to receive the ball d. lVhen the inner ring 0 is held by partly withdrawing the bolt a,

Specificationfof Letters Patent; Patented Mar. :21, 1922. App lieation-flled December 28, 1921. Serial in). 525,439.

the outer ring'e may be rotated so as to leave I: I

the ball cl in any one. of the recesses e and in this manner the combination may be changed. The combination letters or figures show through the; opening b in the case b and theouter rings emaybe rotated by cir cuinferential pressure exerted through the openingt'. I

In the modification shown in' Fig. 8 the inner ring 0 carries a spring 7 the outwardly turned end of which engages with any one of the recesses e in the outer ring 6. The outwardly turned end of the spring f is so short that it will jump out of a recess 6' when the inner ring 0 is prevented from turning asabove described and circumferential pressure is applied to the outer ring 6. The other parts shown in Fig. 8 are similar to those shown in Figs. 1 to 7 and are marked with similar reference letters.

What I claim and desire to secure by Let ters Patent of the United States is 1. In a combination lock, the combination with a circular sliding bolt, of ring projections on the sliding bolt, each ring projec-. tion having a gap and all the gaps being alined, a series of pairs of inner and outer rings, means for frictionally connecting each inner and outer ring to enable the combination to be changed, an inwardly extending projection on each inner ring adapted to engage with the gaps and annular grooves between the ring projections, a circular casing surrounding the series of rings and sliding bolt having a gap for sighting and changing the combination letters on the outer ring, said casing having on one side a fixed end through which the sliding bolt is adapted to project, and on the other side a removable end for retaining the series of rings within the casing, a shank of section other than circular on the outer end of the sliding bolt passing through a corresponding hole in the removable end to prevent the bolt rotating, and a handle removably connected to the outer end of the said shank.

2. In a combination lock, the combination with a casing having a sight opening in its wall, said casing having one fixed end and one removable end, of a bolt passing through said casing, said bolt having a shank of other than round cross section. bearing in one end of: the casing, a series of pairs of ring of each pair having a resilient latch member and the other ring of each pair having an opening to receive said latch memher, an inwardly extendingtprojection on the inner ring of each pan of rings and spaced ring projections on the bolt, each ring projection having a gap and all the gaps being i al-inedito form a longitudinal groove adapted to receive said inwardly extending projections.

3. In a combination lock, the combination with a casing having a sight'opening in its wall, said casing having one fixed end and one removable'end, ofa bolt passing through said casing saidbolt having a shank of other than roundcrosssection bearing in the removable end of the casing, spaced ring projections on said bolt each ring rojection having a gap and all the gaps belng alined witnesses. i

' f ARTHUR PASS; l Vitnessesz' f ALBERT EDGAR ALEXANDER,

Cnoinm WINIFRED ROMEDDER. 

